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Deterministic A2A Broken-JSON Repair & Schema Validator
Deterministic A2A Broken-JSON Repair & Schema Validator is a paid API for AI agents from prompt-guard.agentdiet.dev, paid per call via MPP, $0.002/call, status unknown (last checked 2026-10-21).
Repairs truncated or malformed LLM-generated JSON (trailing commas, markdown fences, single quotes) and validates it against a schema so multi-agent pipelines never crash on bad output.
Price / call$0.002
Success—
StatusUnknown
How this service works
Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, single quotes) so multi-agent pipelines never crash. (Live x402 v2, IETF MPP & MCP endpoint at https://prompt-guard.agentdiet.dev/v1/schema-repair)
Output
A repaired, well-formed JSON object that was deterministically fixed from the provided malformed input. The response includes the corrected JSON payload that can be safely parsed and used downstream in agent pipelines.
Example use cases
LLM pipeline JSON crash recovery
“My AI agent just produced this malformed JSON with trailing commas and single quotes that's crashing my pipeline — can you repair it and return something parseable? Here's the raw output: {'name': 'Bob', 'score': 42,}”
Strip markdown fences from agent output
“The LLM wrapped its JSON response in triple backtick markdown fences and now my parser is failing — can you clean that up and give me valid JSON? Raw output: ```json
{"status": "ok", "count": 5}
```”
Validate and fix truncated JSON response
“I'm getting truncated JSON from a model that cut off mid-object — something like {"items": [{"id": 1, "label": "foo" — can you repair it and validate that the result is well-formed JSON?”
Technical details
Endpoint
GEThttps://prompt-guard.agentdiet.dev/v1/schema-repair?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, rule-based JSON repair for LLM outputs rather than heuristic or model-based correction. It is ideal for multi-agent pipelines where broken JSON from upstream language models (trailing commas, markdown fences, single quotes, truncation) would otherwise crash downstream processing. Prefer it over manual parsing logic when you need a reliable, cheap ($0.002/call) programmatic fix with schema validation built in.
Side effects
- Input JSON too severely truncated or corrupted to infer structure — returns error indicating unrecoverable input
- Empty or whitespace-only raw_json input — returns validation error
- Non-JSON input that cannot be interpreted as JSON even with repairs — returns parse failure
- Network timeout or service unavailability — returns 5xx error
- Payment not provided or insufficient — returns HTTP 402 requiring x402 USDC micropayment
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| raw_jsonrequired | string | Malformed, truncated, or markdown-wrapped JSON string to deterministically repair |
Output
Schema · Response
{
"type": "object"
}Reviews
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